anonymous
  • anonymous
Identify the 42nd term of an arithmetic sequence where a1 = -12 and a27 = 66.
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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jdoe0001
  • jdoe0001
notice the common ratio between \(\bf \large a_1\quad and \quad a_27\) there are 78 units between -12 and +66 and from the 1st term, to the 27th term, the common ratio has been used 26 times to get there thus 78/26 will be the ratio from there use the arithmetic sequence equation to find the 27th term \(\bf \large a_{27} = a_1+(27-1)\textit{common ratio}\)

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